title: [Longitudinal assessment of body composition by different methods as product of a integral intervention for treating obesity in Chilean children school].
abstract: BACKGROUND
  In Chile, the main nutritional problem of children, is obesity. The alarming increase in childhood obesity, has generated an urgent need to develop prevention and treatment programs, unfortunately, the results have been disappointing because they have not achieved the expected impact on the nutritional status of the target population. For this it is necessary to use other strategies, such as incorporating exercise of muscle strength.
  
  
  OBJECTIVE
  To determine the impact of an integral intervention (exercise, nutritional education and psychological support) in the body composition of obese school children after the intervention and post-intervention.
  
  
  METHODS
  The sample consisted of 61 obese children (BMI = p 95) of both sex, between 8 and 13 years old, who participated in an integral intervention for treating childhood obesity in the short term (3 months) and medium term (12 months). Body composition was assessed by isotope dilution, plethysmography, radiographic absorptiometry and four-compartment model of Fuller.
  
  
  RESULTS
  There was a significant increase over time in FFM (kg) by 4C in both sex, GC (%) by isotope dilution in boys was reduced in the post-intervention, while in girls decreased significantly over time and FFM (kg) by isotope dilution significantly increased in both sex. According to the magnitude and direction of change in time, there was only significant difference by sex in FFM (%) by isotope dilution, the increase was significantly higher in boys a result of the intervention (p = 0,000).
  
  
  CONCLUSIONS
  An intervention that includes programmed exercise improves body composition. However, its effect is reversed in the medium term if training ceases. This reaffirms the need for sustainability of interventions over time.
authors.affiliation: Escuela de Nutrición y Dietética, Facultad de Medicina, Universidad de Chile, Santiago, Chile. fvasquez@med.uchile.cl
authors.forename: Fabián
authors.initials: F
authors.lastname: Vásquez
authors.forename: Erik
authors.initials: E
authors.lastname: Diaz
authors.forename: Lydia
authors.initials: L
authors.lastname: Lera
authors.forename: Loretta
authors.initials: L
authors.lastname: Vásquez
authors.forename: Alyerina
authors.initials: A
authors.lastname: Anziani
authors.forename: Bárbara
authors.initials: B
authors.lastname: Leyton
authors.forename: Raquel
authors.initials: R
authors.lastname: Burrows
mesh_terms: D015502:Absorptiometry, Photon; D000293:Adolescent; D000886:Anthropometry; D001823:Body Composition / Q000502:physiology*; D002648:Child; D053198:Child Nutrition Sciences / Q000193:education; D002677:Chile; D015444:Exercise; D005260:Female; D006293:Health Promotion; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D053580:Muscle Strength; D063766:Pediatric Obesity / Q000175:diagnosis* / Q000628:therapy*; D010991:Plethysmography; D011865:Radioisotope Dilution Technique; D012727:Sex Characteristics